Dura-Grit are powerful, long lasting cutting and shaping tools that finish as they cut! This starter set gives you everything you need for carving and shaping! They are unique, strong; carbide coated steel shapes, mounted on 3.2mm (1/8") heavy duty mandrels. Made with tungsten-carbide grit, braze welded to steel, Dura-Grit tools are extremely strong and aggressive.